One of the mechanisms of evolution: Non-random mating
- ruby
- 2015년 12월 18일
- 1분 분량
Since non-random mating occurs when a certain organism choose desirable traits over less desirable traits, it gives more opportunity to mate than others, and to produce more offspring. When the probability is the same, then individuals tend to mate with distant relatives as with close relatives.
Two types of Nonrandom mating
- Assortative mating: mating between individuals with similar phenotypes or among individuals that occur in a certain location
- Inbreeding: mating between related individuals. For example, pea flowers include both male and female reproductive structures. The advantage to the pea plant is that self-fertilization takes place if the plant is not able to reproduce sexually via, for example, the action of a pollinating insect.
Animals
Purebred animals tend to have higher incidence of deformities and health problems compared with non-purebred animals. For some purebred animals, fertility rates are very low and offspring die at a young age.
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